/Engine/Source/Runtime/Core/Public/Containers/RingBuffer.h
Move the value at the given index into the back pointer of the RingBuffer, and shift all elements behind of it up by one to make room for it. Invalid to call with an index less than 0 or greater than or equal to the number of elements in the RingBuffer.
void ShiftIndexToBack ( [IndexType](API\Runtime\Core\Containers\TRingBuffer\IndexType) Index )